Analytically controlling laser-induced electron phase in sub-cycle motion
Abstract
Precise control of the electron phase accumulated during its sub-cycle motion within intense laser fields is essential in strong-field physics, yet remains mostly indirect and complicated so far. In this Letter, we develop a novel approach to control this sub-cycle electron phase by tuning a low-frequency electric field applied on a centrosymmetric gaseous target during its interaction with a few-cycle infrared laser pulse. Our method is based on a universal analytical relation between the low-frequency electric field and its induced harmonic frequency shift, derived by the strong-field approximation. This simple relation and its universality are confirmed numerically by directly solving the time-dependent Schr\"odinger equation. Moreover, we discuss the benefits of the discovered relation in \textit{in situ} applications, including continuously and precisely tuning XUV waves and developing a new method of comprehensively sampling THz pulse.
Cite
@article{arxiv.2405.11753,
title = {Analytically controlling laser-induced electron phase in sub-cycle motion},
author = {Doan-An Trieu and Trong-Thanh D. Nguyen and Thanh-Duy D. Nguyen and Thanh Tran and Van-Hoang Le and Ngoc-Loan Phan},
journal= {arXiv preprint arXiv:2405.11753},
year = {2024}
}
Comments
6 pages, 3 figures